有机半导体薄膜空间电荷分布对晶体管性能影响的研究进展

有机场效应晶体管(OFETs)是下一代柔性电子产业的基础元件,具有可弯曲、透明、低成本、可溶液加工等优良特性,并逐渐开始应用于生物传感器、柔性显示等领域。 然而,OFETs仍存在如工作电流小、跨导小、开关比低、空气稳定性差等问题,限制了其进一步的发展。 OFETs器件的性能主要受到导电沟道中电荷和电流分布的影响,若能通过外加手段,调控沟道中的电荷和电流分布,可能获得具有更高性能或新机理的器件。 本文结合课题组内的工作,对国内外该领域的最新进展进行综述和展望。

Research Progress on the Effect of Space Charge Distribution of Organic Semiconductor Thin Films on Transistor Performance

Organic field effect transistors(OFETs) are the basic components of the next generation of flexible electronics industry, which are bendable, transparent and solution-processible, and gradually begin to be applied to biosensors, flexible display and other fields. However, OFETs still have problems such as small operating current, small transconductance, low switching ratio, and poor air stability, which limits their further development. The performance of OFETs devices is mainly affected by the distribution of charge and current in the conductive channel. If the charge and current distribution in the channel are properly controlled by external means, it is possible to obtain a device with higher performance or new mechanism. The latest progress on this field is reviewed and prospected, which includes the recent result from our group.